//Table keyboard navigation
$('.datatable').on('keydown','td',function(e){
    var currCell = $(this);
    var row = $(this).closest('tr');
    if (e.which == 13 ) { // return
        if($(row).attr('onclick')){
            $(row).trigger("click");
        }else if($(row).find("td:first-child i.icon-plus").length > 0){
            $(row).find("td:first-child i.icon-plus").click();
        }else if($(row).find('a[href]').length > 0){
            $(row).find('a[href]').click();
        }else if($(row).find('.footnote').length > 0){
            $(row).find('.footnote').trigger('click');
        }
    }

    var c = "";
    var tabables = $('a[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), *[tabindex]');
    if (e.which == 39) {
        // Right Arrow
        c = currCell.next();
        if(c.length == 0){
            c = currCell.closest('tr').next().find('td:first');
            if(c.length == 0){
                var index = tabables.index(this);
                c = tabables.eq(index + 1);
            }
        }
    } else if (e.which == 37) {
        // Left Arrow
        c = currCell.prev();
        if(c.length == 0){
            c = currCell.closest('tr').prev().find('td:last');
            if(c.length == 0){
                var index = tabables.index(this);
                c = tabables.eq(index - 1);
            }
        }
    } else if (e.which == 38) {
        // Up Arrow
        c = currCell.closest('tr').prev().find('td:eq(' +
            currCell.index() + ')');
        if(c.length == 0){
            var index = tabables.index(this);
            c = tabables.eq(index - 1);
        }
    } else if (e.which == 40) {
        // Down Arrow
        c = currCell.closest('tr').next().find('td:eq(' +
            currCell.index() + ')');
        if(c.length == 0){
            var index = tabables.index(this);
            c = tabables.eq(index + 1);
        }
    } else if (e.which == 9 && !e.shiftKey) {
        // Tab
        e.preventDefault();
        c = currCell.next();
        if(c.length == 0){
            c = currCell.closest('tr').next().find('td:first');
            if(c.length == 0){
                var index = tabables.index(this);
                c = tabables.eq(index + 1);
            }
        }
    } else if (e.which == 9 && e.shiftKey) {
        // Shift + Tab
        e.preventDefault();
        c = currCell.prev();
        if(c.length == 0){
            c = currCell.closest('tr').prev().find('td:last');
            if(c.length == 0){
                var index = tabables.index(this);
                c = tabables.eq(index - 1);
            }
        }
    }

    // If we didn't hit a boundary, update the current cell
    if (c.length > 0) {
        currCell = c;
        currCell.focus();
    }
});